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Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
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Thesis - Civil Engineering >
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http://hdl.handle.net/123456789/2262
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| Title: | A STUDY ON THE INFLUENCE OF SOIL FLEXIBILITY ON THE INTERNAL FORCE DISTRIBUTION OF BUILDINGS SUBJECTED TO LATERAL STATIC LOADS |
| Authors: | Gashaye, Amsalu |
| Advisors: | Dr. - Ing. Asrat Worku |
| Keywords: | Civil Engineering. |
| Copyright: | Jan-2005 |
| Date Added: | 3-May-2012 |
| Publisher: | AAU |
| Abstract: | This work deals with the investigation of the influence of soil flexibility on the internal force
distributions of buildings subjected to lateral static loads. The soil flexibility, which usually is
neglected in the conventional analysis of buildings subjected to static lateral loads, has been
accounted for by introducing static elastic springs. Three structural systems have been
considered. They include Structural system 1 representing framed buildings and Structural
Systems 2 and 3 representing dual (frame-wall) systems. They have been selected in such a
manner that their properties fall within the range of applicability of the pseudo- static method
of analysis for lateral loads. Comparison was made between the internal force distributions
of the fixed-base structural system and the flexible-base structural system as obtained using
the structural analysis software-ETABS. The flexible-base system has been modeled to
account for the flexibility of the soil with all the influencing parameters like the foundation
shape and type, embedment depth and soil types. For the structural systems studied, it was
found that the soil flexibility has resulted in a significance difference in internal force
distribution specially in the bending moments around the supports of end spans of beams,
where the designs moments are already large in the conventional analysis. In the dual
systems, accounting for the flexibility of the soil has resulted in differences of bending
moments, shear forces and axial forces in the shear walls. Generally, the influence has been
found to be more pronounced in the dual systems. This observation has a direct practical
significance in that dual systems are the common types of structural systems employed in
buildings susceptible to lateral load effects |
| URI: | http://hdl.handle.net/123456789/2262 |
| Appears in: | Thesis - Civil Engineering
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